I tried to take it into a hardware store but they didn’t have anything. I am going to take the brush out and cover the hole with duct tape for now. I might try measuring it but and hoping whatever I order works but was hoping someone had found a solution!
Edit: I’m not looking for anything that spins. Just something like this https://www.amazon.com/gp/aw/d/B077NPDMHW?psc=1&ref=ppx_pop_mob_b_asin_image